CN209868181U - A beveling processing apparatus for circular part - Google Patents

Abstract

A beveling processing apparatus for circular part relates to the optical parts processing field. Comprises a sliding sleeve, a processing die, a first mandril and a second mandril. The first ejector rod and the second ejector rod are in transmission connection with the driving device. The sliding sleeve is sleeved on the first ejector rod. The processing mould is connected in the sliding sleeve, and the processing portion is sunken to form and be the sphere by the surface of processing mould, and processing portion sets up with first ejector pin is coaxial. The second ejector rod is provided with a first moving stop point and a second moving stop point along the axial direction. When the second ejector rod is positioned at the first moving stop point, the second ejector rod is far away from the first ejector rod. When the second ejector rod is positioned at the second moving stop point, the second ejector rod is close to the first ejector rod so as to enable the optical part to be abutted against the first ejector rod. The improved machining device is simple in structure, low in cost and convenient to use, can be used for modifying traditional machining equipment, achieves mechanical and fine improvement, and is beneficial to improving machining precision and machining efficiency.

Description

A beveling processing apparatus for circular part

Technical Field

The utility model relates to an optical parts machining field particularly, relates to a beveling processing apparatus for circular part.

Background

With the development of optical glass processing technology, modern optical glass processing technology tends to be more and more mechanized, automated and intelligent, and some processing technologies mainly controlled by hands in the past cannot meet the processing requirements of optical glass. For conventional manufacturers, if technical upgrades are to be made, the entire batch of equipment needs to be replaced, the cost is enormous, and not all manufacturers (especially small scale manufacturers) can be fully affordable.

In view of this, the present application is specifically made.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a beveling processing apparatus for circular part, its simple structure, low cost, convenient to use can be used for reequiping traditional processing equipment, realize mechanization, the improvement that becomes more meticulous, help improving machining precision and machining efficiency.

The embodiment of the utility model is realized like this:

a beveling apparatus for a round part, comprising: the optical part fixing device comprises a sliding sleeve, a processing die, a first ejector rod and a second ejector rod, wherein the first ejector rod and the second ejector rod are used for fixing and driving the optical part to rotate.

The first ejector rod and the second ejector rod are in transmission connection with the driving device, and the central axes of the first ejector rod and the second ejector rod are overlapped. The first ejector rod is located to the sliding sleeve cover, along the axial and circumference of first ejector rod, the sliding sleeve all with first ejector rod swing joint.

The processing mould is connected to the one end that is close to the second ejector pin of sliding sleeve, and the processing mould has the through-hole of stepping down that is used for stepping down for first ejector pin. The processing portion of the processing die is arranged towards the second ejector rod, the processing portion is formed by the surface of the processing die in a concave mode, the wall surface of the processing portion is an inner concave spherical wall, and the processing portion and the first ejector rod are coaxially arranged.

The second ejector rod is provided with a first moving stop point and a second moving stop point along the axial direction. When the second ejector rod is positioned at the first moving stop point, the second ejector rod is far away from the first ejector rod. When the second ejector rod is positioned at the second moving stop point, the second ejector rod is close to the first ejector rod so as to enable the optical part to be abutted against the first ejector rod.

Further, still be provided with protective case between first ejector pin and the sliding sleeve, protective case cover locates first ejector pin and with lathe fixed connection, first ejector pin rotationally holding in protective case. The protective sleeve is located to the sliding sleeve cover, along the axial of first ejector pin, sliding sleeve and protective sleeve swing joint.

Furthermore, the protective sleeve is connected with the first ejector rod through a rolling bearing, and the protective sleeve is connected with the sliding sleeve through a sliding bearing.

Furthermore, the processing die is detachably connected with the sliding sleeve.

Furthermore, the outer wall of the sliding sleeve is connected with a transmission rod arranged along the radial direction of the first ejector rod, and the transmission rod is provided with a connecting part used for being connected with the movable end or the handle of the pushing device.

Furthermore, the beveling processing device is also provided with a positioning guide rail, the positioning guide rail is arranged along the axial direction of the first ejector rod and is arranged at intervals with the first ejector rod, and the positioning guide rail is provided with a guide groove extending along the length direction of the positioning guide rail. The outer wall of the sliding sleeve is provided with an extension arm extending towards the guide groove, and the end part of the extension arm is provided with a guide wheel which is matched with the guide groove in a sliding way.

Further, the groove width of the guide groove is slightly larger than the thickness of the guide wheel.

Further, the positioning guide rail comprises a base plate, a first baffle plate, a second baffle plate and a third baffle plate. The first baffle and the second baffle are perpendicular to the substrate and are connected to the same side of the substrate, and the first baffle and the second baffle are arranged at intervals. The third baffle is connected in the one end of keeping away from the base plate of first baffle and the setting of the first baffle of perpendicular to, and the third baffle is extended towards the one side of keeping away from the second baffle by first baffle, and base plate, first baffle and third baffle enclose into the guide recess.

The positioning guide rail is further provided with two sets of limiting pins, and the limiting pins penetrate through the first baffle and extend to the guide groove. The limiting pin is matched with an elastic part, so that the limiting pin can slide towards one side of the second baffle to give way after abutting against the guide wheel. Two sets of spacer pins are arranged at intervals along the length direction of the guide groove. When the guide wheel is positioned between the two groups of limiting pins, the two groups of limiting pins are propped against the guide wheel.

Further, the limiting pin is provided with a guide column, and the guide column penetrates through and is matched with the second baffle in a sliding mode. The guide post has the butt board that is used for propping up with one side of first baffle that is close to the second baffle, and the elastic component butt is between butt board and second baffle.

Further, the guide post is the screw rod, and the guide post cooperation has the nut, and the nut is located the one side of keeping away from first baffle of second baffle.

The embodiment of the utility model provides a beneficial effect is:

the embodiment of the utility model provides a beveling processing apparatus is carrying out optical part beveling and is handling man-hour, and first ejector pin is kept away from to the first second ejector pin of moving earlier, and the optical part who will treat processing lays back between first ejector pin and second ejector pin, and the second ejector pin of redriving resets and is fixed in between first ejector pin and the second ejector pin with the optical part centre gripping. The first mandril and the second mandril are driven by a driving device of the lathe, so that the optical parts also rotate together at high speed. At the moment, the sliding sleeve is pushed to enable the processing die to slide towards one side where the second ejector rod is located, the processing portion of the processing die is made to be close to the optical part, and therefore the processing portion is used for carrying out fine trimming and processing on the chamfered surface of the optical part. After the processing is finished, the sliding sleeve is pushed to reset the processing die, the second ejector rod is driven again to be far away from the first ejector rod after the driving device is stopped, and the processed optical part can be taken out. At this point, a processing operation is completed.

In the processing procedure, the sliding sleeve and the processing die are matched for use, so that the smoothness and the accuracy in the movement process of the processing die are greatly improved, and the processing condition can be effectively controlled by an operator only by controlling the axial advancing distance of the sliding sleeve and the processing die. The operation difficulty is greatly reduced, the technical requirements on operators are reduced, the dependence on personal proficiency is also greatly reduced, and the operation is more convenient and simpler. In addition, the processing die utilizes the processing part of which the wall surface is the spherical wall to polish the chamfered surface of the optical part, and the processing part also has a centering function on the optical part, so that the optical part can be effectively prevented from generating lateral deviation, and the time required by processing is shortened.

Generally, the embodiment of the utility model provides a beveling processing apparatus simple structure, low cost, convenient to use can be used for reequiping traditional processing equipment, realize mechanization, the improvement that becomes more meticulous, help improving machining precision and machining efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of a first working state of a beveling apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view of a second operating state of the beveling apparatus shown in FIG. 1;

FIG. 3 is a schematic structural diagram of another view angle of the chamfering apparatus in FIG. 1;

FIG. 4 is an enlarged view of area A of FIG. 3;

fig. 5 is a schematic structural view of the positioning rail in fig. 3.

Icon: a beveling apparatus 1000; a sliding sleeve 100; a transmission rod 110; a handle 120; an extension arm 130; a guide pulley 140; processing the die 200; a processing section 220; a first top bar 300; a second lift pin 400; a protective sleeve 600; positioning the guide rails 700; a guide groove 710; a substrate 720; a first baffle 730; a second baffle 740; a third baffle 750; a spacing pin 800; a guide post 810; an abutment plate 820; an elastic member 830; a nut 840; an optical component 900.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1-2, the present embodiment provides a chamfering apparatus 1000 for circular parts. The chamfering apparatus 1000 includes: the sliding sleeve 100, the processing die 200, the first push rod 300 and the second push rod 400 for fixing and driving the optical part 900 to rotate. The first ram 300 and the second ram 400 are mounted on a lathe (not shown) and driven by a driving device (not shown) of the lathe, and the central axes of the first ram 300 and the second ram 400 are arranged to overlap. The end surfaces of the first and second push rods 300 and 400 have clamping parts for clamping an optical part 900 (e.g., a lens), and the optical part 900 is clamped between the first and second push rods 300 and 400 and driven by the first and second push rods 300 and 400 to rotate. In this embodiment, the driving device is a driving motor.

The sliding sleeve 100 is sleeved on the first top rod 300, and the sliding sleeve 100 and the first top rod 300 are movably connected along the axial direction and the circumferential direction of the first top rod 300. In other words, the sliding sleeve 100 can slide relative to the first carrier rod 300 not only along the axial direction of the first carrier rod 300, but also can rotate relative to the first carrier rod 300 along the circumferential direction of the first carrier rod 300. In this way, the sliding sleeve 100 can be used without interference even when the first push rod 300 is operated.

The processing mold 200 is connected to one end of the sliding sleeve 100 close to the second ejector rod 400, the processing mold 200 has a yielding through hole for yielding the first ejector rod 300, and the processing mold 200 is also sleeved on the first ejector rod 300 and can move relative to the first ejector rod 300 along with the sliding sleeve 100.

The processing portion 220 of the processing die 200 is disposed toward the second ejector pin 400, the processing portion 220 is a recessed area formed by the surface of the processing die 200 being recessed, the wall surface of the processing portion 220 is a concave spherical wall, and in this embodiment, the processing portion 220 is disposed coaxially with the first ejector pin 300.

The second push rod 400 can move in its axial direction with respect to the first push rod 300, and in other words, the second push rod 400 can move closer to and away from the first push rod 300 to clamp and release the optical part 900. Namely: the second jack 400 has a first movement stop point and a second movement stop point in its axial direction. When the second push rod 400 is located at the first moving stop point, the second push rod 400 is far away from the first push rod 300, and at this time, the optical component 900 can be placed between the first push rod 300 and the second push rod 400, or the optical component 900 between the first push rod 300 and the second push rod 400 can be taken out. When the second push rod 400 is located at the second moving stop point, the first push rod 300 and the second push rod 400 are close to each other, and the optical component 900 is abutted between the clamping parts of the second push rod 400 and the first push rod 300. In this embodiment, the second ram 400 is rotatably mounted on a movable platform (not shown), and the movable platform is slidably mounted on the lathe, the sliding direction of the movable platform is along the axial direction of the first ram 300 and the second ram 400, the movable platform is driven by a cylinder assembly (not shown), and the movable platform drives the second ram 400 to move away from and close to the first ram 300 to realize the operation of moving away from and close to the first ram 300.

When the optical part 900 is chamfered, the cylinder assembly is used to drive the second push rod 400 to move away from the first push rod 300, the optical part 900 to be machined is placed between the first push rod 300 and the second push rod 400, and then the second push rod 400 is driven to reset, so that the optical part 900 is clamped and fixed between the first push rod 300 and the second push rod 400. The first and second lift pins 300 and 400 are driven by a driving device of a lathe, so that the optical part 900 is also rotated at a high speed. At this time, the slide bush 100 is pushed to slide the processing die 200 toward the side where the second ejector pin 400 is located, and the processing portion 220 of the processing die 200 is brought close to the optical component 900, as shown in fig. 2, so that the chamfered surface of the optical component 900 is finished and processed by the processing portion 220. After the processing is finished, the slide sleeve 100 is pushed to reset the processing mold 200, as shown in fig. 1, the driving device is stopped, and then the second push rod 400 is driven again to be far away from the first push rod 300, so that the processed optical part 900 can be taken out. At this point, a processing operation is completed.

In the above processing process, the sliding sleeve 100 and the processing mold 200 are used in cooperation, so that the smoothness and accuracy of the processing mold 200 in the movement process are greatly improved, and the processing condition can be effectively controlled by an operator only by controlling the axial advancing distance of the sliding sleeve 100 and the processing mold 200. The operation difficulty is greatly reduced, the technical requirements on operators are reduced, the dependence on personal proficiency is also greatly reduced, and the operation is more convenient and simpler. In addition, the processing die 200 polishes the chamfered surface of the optical component 900 by using the processing portion 220 having a spherical wall surface, and the processing portion 220 also has a centering effect on the optical component 900, so that the optical component 900 can be effectively prevented from being misaligned, and the time required for processing is shortened.

Overall, the beveling processing device 1000 has the advantages of simple structure, low cost and convenient use, can be used for modifying traditional processing equipment, realizes mechanical and fine improvement, and is beneficial to improving the processing precision and the processing efficiency.

Further, a protective sleeve 600 is further disposed between the first top rod 300 and the sliding sleeve 100, the protective sleeve 600 is sleeved on the first top rod 300 and fixed to the lathe, and the first top rod 300 is rotatably received in the protective sleeve 600. The sliding sleeve 100 and the processing mold 200 are both sleeved on the protection sleeve 600. The sliding sleeve 100 and the processing mold 200 are movably connected with the protection sleeve 600 along the axial direction of the first push rod 300. The protection sleeve 600 can limit the first push rod 300 to prevent the first push rod 300 from deforming or bending, and also prevent the sliding sleeve 100 from being worn due to direct contact with the first push rod 300, thereby prolonging the service life. Meanwhile, the first carrier rod 300 does not influence the movement of the sliding sleeve 100 and the processing mold 200, so that the sliding sleeve 100 and the processing mold 200 are more convenient to control.

In this embodiment, the protection sleeve 600 is connected to the first carrier rod 300 by a rolling bearing (not shown), and the protection sleeve 600 is connected to the sliding sleeve 100 by a sliding bearing (not shown). In order to facilitate the replacement of the processing mold 200, a detachable connection is provided between the processing mold 200 and the sliding sleeve 100, such as: and (4) connecting by screw threads. By replacing the processing die 200 with a processing portion 220 having a different surface material, grain size and curvature, different processing requirements for the optical part 900 can be met.

Further, a transmission rod 110 disposed along a radial direction of the first carrier bar 300 is connected to an outer wall of the sliding sleeve 100, and the transmission rod 110 has a connection portion for connecting with a movable end of the pushing device or the handle 120. In this embodiment, the end of the transmission rod 110 is connected to a handle 120 for manual operation. In other embodiments of the present invention, the transmission rod 110 can be connected to the screw mechanism to drive the sliding sleeve 100 to move axially by the servo motor, thereby further improving the accuracy and the degree of automation in the machining process.

In this embodiment, please refer to fig. 3 to 5, the chamfering processing apparatus 1000 further includes a positioning guide rail 700, the positioning guide rail 700 is disposed at a side of the processing mold 200, the positioning guide rail 700 is disposed along an axial direction of the first lift pin 300 and the second lift pin 400 and spaced apart from the first lift pin 300 and the second lift pin 400, and the positioning guide rail 700 is provided with a guide groove 710 extending along a length direction thereof. The outer wall of the sliding sleeve 100 has an extension arm 130 extending toward the guide groove 710, and the end of the extension arm 130 has a guide wheel 140, and the guide wheel 140 is slidably fitted to the guide groove 710.

Through the above design, the positioning guide 700 can limit the moving range of the sliding sleeve 100, so that the sliding sleeve 100 can only move along the axial direction of the first rod body, thereby preventing the sliding sleeve 100 from deflecting during the moving process, and further improving the moving stability of the sliding sleeve 100. In order to further ensure the stability of the sliding sleeve 100, the groove width of the guide groove 710 is set to be slightly larger than the thickness of the guide wheel 140, and the wheel surface of the guide wheel 140 is in fit with the groove bottom wall of the guide groove 710.

Further, the positioning rail 700 includes a base plate 720, a first stop 730, a second stop 740, and a third stop 750. The first baffle 730 and the second baffle 740 are both disposed perpendicular to the base plate 720 and are connected to the same side of the base plate 720, with the first baffle 730 and the second baffle 740 being spaced apart. The third baffle 750 is connected to one end of the first baffle 730 far away from the base plate 720 and is arranged perpendicular to the first baffle 730, the third baffle 750 extends from the first baffle 730 towards one side far away from the second baffle 740, and the base plate 720, the first baffle 730 and the third baffle 750 enclose the guide groove 710.

The positioning rail 700 is further provided with two sets of limit pins 800, and the limit pins 800 penetrate through the first baffle 730 and extend to the guide groove 710. The spacer pin 800 has a guiding post 810, and the guiding post 810 penetrates the second baffle 740. In the axial direction of the guide column 810, the guide column 810 is slidably fitted to the second stopper 740, and the stopper pin 800 is slidably fitted to the first stopper 730. The guiding column 810 has an abutting plate 820 abutting against one side of the first stop plate 730 close to the second stop plate 740, the limiting pins 800 are all matched with elastic members 830, and the elastic members 830 abut against between the abutting plate 820 and the second stop plate 740. In a natural state, the elastic member 830 presses the abutting plate 820 against the first blocking plate 730, and the limiting pin 800 extends into the guiding groove 710. Two sets of stopper pins 800 are provided at intervals along the length direction of the guide groove 710. The distance between the two sets of limit pins 800 is controlled, so that when the processing die 200 is far away from the optical part 900 and the guide wheel 140 can move between the two sets of limit pins 800, the two sets of limit pins 800 are in contact with the wheel surface of the guide wheel 140.

By such design, when the stop wheel moves toward the region between the two sets of limit pins 800, the guide wheel 140 will first contact with the limit pins 800, and then further push the sliding sleeve 100, the guide wheel 140 will have a tendency to further move toward the region between the two sets of limit pins 800, the guide wheel 140 will push the limit pins 800 toward the side where the second stop plate 740 is located and compress the elastic member 830, and then the guide wheel 140 will "press down" the limit pins 800. After the guide wheel 140 moves to the area between the two sets of limit pins 800, the "pressed" limit pins 800 are reset under the action of the elastic member 830, so that the guide wheel 140 is clamped between the two sets of limit pins 800, and the sliding sleeve 100 is locked in the axial direction of the first push rod 300. In this way, when the grinding process is not performed, the guide wheel 140 is restricted between the two sets of stopper pins 800, so that the sliding sleeve 100 can be prevented from sliding in the axial direction at will, and the processing die 200 can be prevented from moving accidentally.

In order to make the guide wheel 140 more easily be clamped between the two sets of limit pins 800, the limit pins 800 are configured to be semicircular cakes, and the through holes of the first baffle 730 for the sliding of the limit pins 800 are slightly larger than the limit pins 800. The diameter of the circumference corresponding to the limit pin 800 is smaller than the diameter of the guide wheel 140. In this embodiment, the diameter of the circumference corresponding to the limit pin 800 is two thirds of the diameter of the guide wheel 140.

Further, the guiding column 810 is a screw, the guiding column 810 is matched with a nut 840, and the nut 840 is located on one side of the second baffle 740 far away from the first baffle 730. The protruding length of the stopper pin 800 in the guide groove 710 can be changed by turning and adjusting the nut 840, so that the locking strength of the stopper pin 800 to the guide wheel 140 can be changed according to actual needs.

In conclusion, the beveling device 1000 has the advantages of simple structure, low cost and convenience in use, can be used for modifying traditional processing equipment, realizes mechanical and fine improvement, and is beneficial to improving the processing precision and the processing efficiency.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A beveling apparatus for a round part, comprising: the device comprises a sliding sleeve, a processing die, a first ejector rod and a second ejector rod, wherein the first ejector rod and the second ejector rod are used for fixing and driving an optical part to rotate;

the first ejector rod and the second ejector rod are in transmission connection with a driving device, and the central axes of the first ejector rod and the second ejector rod are arranged in a superposition manner; the sliding sleeve is sleeved on the first ejector rod, and the sliding sleeve is movably connected with the first ejector rod along the axial direction and the circumferential direction of the first ejector rod;

the processing die is connected to one end, close to the second ejector rod, of the sliding sleeve, and is provided with a yielding through hole for yielding the first ejector rod; the processing part of the processing die is arranged towards the second ejector rod, the processing part is formed by the surface depression of the processing die, the wall surface of the processing part is an inwards concave spherical wall, and the processing part and the first ejector rod are coaxially arranged;

the second ejector rod is provided with a first moving stop point and a second moving stop point along the axial direction; when the second ejector rod is positioned at the first moving stop point, the second ejector rod is far away from the first ejector rod; when the second ejector rod is positioned at the second moving stop point, the second ejector rod is close to the first ejector rod so as to enable the optical part to be abutted against the first ejector rod.

2. The beveling apparatus according to claim 1, wherein a protective sleeve is further disposed between the first top bar and the sliding sleeve, the protective sleeve is sleeved on the first top bar and is fixedly connected to a lathe, and the first top bar is rotatably received in the protective sleeve; the sliding sleeve is sleeved on the protective sleeve, and the sliding sleeve is movably connected with the protective sleeve along the axial direction of the first ejector rod.

3. The beveling apparatus according to claim 2, wherein the protective sleeve is connected to the first carrier rod by a rolling bearing, and the protective sleeve is connected to the sliding sleeve by a sliding bearing.

4. The beveling apparatus of claim 1, wherein the processing die is removably coupled to the runner.

5. The beveling apparatus according to claim 1, wherein a driving rod is connected to an outer wall of the sliding sleeve in a radial direction of the first pin, and the driving rod has a connecting portion for connecting with a movable end of a pushing device or a handle.

6. The beveling apparatus according to claim 1, further comprising a positioning rail disposed along an axial direction of the first ram and spaced apart from the first ram, the positioning rail being provided with a guide groove extending along a length direction thereof; the outer wall of the sliding sleeve has an extension arm extending toward the guide groove, and the end of the extension arm has a guide wheel slidably fitted into the guide groove.

7. The beveling apparatus according to claim 6, wherein a groove width of the guide groove is slightly larger than a thickness of the guide roller.

8. The beveling apparatus according to claim 6, wherein the positioning rail comprises a base plate, a first fence, a second fence, and a third fence; the first baffle plate and the second baffle plate are both perpendicular to the substrate and connected to the same side of the substrate, and the first baffle plate and the second baffle plate are arranged at intervals; the third baffle plate is connected to one end, far away from the base plate, of the first baffle plate and is perpendicular to the first baffle plate, the third baffle plate extends from the first baffle plate to one side, far away from the second baffle plate, and the base plate, the first baffle plate and the third baffle plate enclose the guide groove;

the positioning guide rail is also provided with two groups of limiting pins, and the limiting pins penetrate through the first baffle and extend to the guide groove; the limiting pins are matched with elastic pieces, so that the limiting pins can slide towards one side of the second baffle to give way after abutting against the guide wheels; the two groups of limiting pins are arranged at intervals along the length direction of the guide groove; when the guide wheel is positioned between the two groups of limiting pins, the two groups of limiting pins are abutted to the guide wheel.

9. The beveling apparatus of claim 8, wherein the spacing pin has a guide post that extends through and slidably engages the second fence; the guide post is provided with a butt joint plate which is used for abutting against one side, close to the second baffle, of the first baffle, and the elastic piece abuts between the butt joint plate and the second baffle.

10. The beveling apparatus of claim 9, wherein the guide post is a threaded rod that engages a nut on a side of the second stop remote from the first stop.